{Jackass penguin} (Zo["o]l.), any species of penguin of the
genus {Spheniscus}, of which several are known. One
species ({Spheniscus demersus}) inhabits the islands near
the Cape of Good Hope; another ({Spheniscus Magellanicus})
is found at the Falkland Islands. They make a noise like
the braying of an ass; -- hence the name.